Comparison of traditional and zero-conditioning flotation performances of oxidized anthracite coal

Xia, Wencheng; Ren, Chuancheng; Peng, Yaoli; Pan, Dong

doi:10.1016/j.powtec.2015.02.002

Cited by 37 publications

(2 citation statements)

References 19 publications

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“…The CC, CH 3 , and CH 2 groups are responsible for hydrophobicity in coal, while CO, OH, and COC groups impart hydrophilicity. [ 57 ] The peak intensity of hydrophobic groups is less than that of the hydrophilic group, confirming the surface oxidation of coal.…”

Section: Resultsmentioning

confidence: 98%

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

et al. 2023

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The present paper outlines the characterization, electrokinetic behaviour, and flotation response of rejected coking coal fines with 32.5% ash generated in a coal washery in Eastern India. The response methodology and central composite rotatable design (RSM-CCRD) were used for the process modelling and optimization of the flotation process using diesel, methyl isobutyl carbinol (MIBC), and sodium hexametaphosphate as a collector, frother, and depressant to maximize ash reduction, yield, and combustible recovery. At optimum condition, a 9.7% clean ash coal was achieved with a 63% yield at collector, frother, and depressant dosages of 0.78, 0.31, and 0.80 kg/ton, respectively. The model prediction and experimental data corroborated sufficiently. Subsequently, within 1 year, the fines oxidized and did not float with the collector. Fourier-transform infrared spectroscopy (FTIR) confirmed surface oxidation on oxidized coal. The oxidized coal responded favourably to acid oil, a vegetable oil refinery waste. With acid oil as a collector, the oxidized coal can upgrade to 12% clean ash coal with a 60% yield; the combustible recovered is 80%. The work indicates successful upgradation of fresh and oxidized coal using the froth flotation process.

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Section: Resultsmentioning

confidence: 98%

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

et al. 2023

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“…However, diesel is not efficient in the flotation of oxidised coals. The oxidation of coals generates oxygen-containing groups which prevent the adsorption of diesel on coal surfaces [1,[3][4][5][6]. In the previous study, we used X-ray photoelectron spectroscopy (XPS) to determine the degree of coal surface oxidation as the atomic percentage (at.%) of oxidised carbon on coal surfaces [1].…”

Section: Introductionmentioning

confidence: 99%

The interaction between diesel and surfactant Triton X-100 and their adsorption on coal surfaces with different degrees of oxidation

2019

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Surface properties of aged coal and their effects on bubble–particle attachment during flotation

Zhou

Albijanic

Tadesse

et al. 2020

Advanced Powder Technology

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Comparison of traditional and zero-conditioning flotation performances of oxidized anthracite coal

Cited by 37 publications

References 19 publications

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

Flotation response of coal washery reject fines: Characteristics, process optimization, and oxidation

The interaction between diesel and surfactant Triton X-100 and their adsorption on coal surfaces with different degrees of oxidation

Surface properties of aged coal and their effects on bubble–particle attachment during flotation

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